Brown Butter Coffee Cake features an ultra moist and flavorful brown butter sour cream cake with a sweet cinnamon brown sugar streusel throughout. My all time favorite coffee cake recipe!
In a medium slightly deep stainless skillet set over medium heat melt the butter. Swirling the pan occasionally, continue to cook the butter. It should become foamy with audible cracking and popping noises. Once the crackling stops continue to swirl the pan until the butter develops a nutty aroma and brown bits start to form at the bottom. Once the bits are amber in color, about 2 to 3 minutes after the popping stops, remove from heat and pour into a medium mixing bowl and let cool slightly.